The Crooked Web is a 1955 crime film noir directed by Nathan Juran and starring Frank Lovejoy, Mari Blanchard and Richard Denning.
[1] Stan Fabian runs a drive-in restaurant with girlfriend Joanie Daniel, whose brother Frank turns up for a visit.
Joanie has declined to marry Stan because he's strapped for cash, but Frank tempts him with a proposition, mentioning that he and a partner hid a stash of gold in Germany during the war.
A rich businessman's son was apparently killed by Stan during a deal gone wrong, but the German police are unable to extradite him to charge him with a crime.
Stan fears a double-cross, but confesses his wartime murder to Joanie, and is shocked to be placed under arrest.